1 Samuel 17:48-54

48As the Philistine started forward to attack him, David ran quickly toward the battle line to meet him. 49Then David reached into his bag, took out a stone, and slung it, striking the Philistine on the forehead. The stone sank into his forehead, and he fell facedown on the ground.

50Thus David prevailed over the Philistine with a sling and a stone; without a sword in his hand he struck down the Philistine and killed him. 51David ran and stood over him. He grabbed the Philistine’s sword and pulled it from its sheath and killed him, and he cut off his head with the sword.

When the Philistines saw that their hero was dead, they turned and ran. 52Then the men of Israel and Judah charged forward with a shout and pursued the Philistines to the entrance of Gath1 and to the gates of Ekron. And the bodies of the Philistines were strewn along the Shaaraim road to Gath and Ekron.

53When the Israelites returned from their pursuit of the Philistines, they plundered their camps. 54David took the head of the Philistine and brought it to Jerusalem, and he put Goliath’s weapons in his own tent.